Drier



Oct. 2, 1923. 1,469,294

A. c. DAMAN DRIER Filed J 26. v 2 Sheets-Sheet 1 [NVE/VTUR Arron/vs)Oct. 2,1923. 1,469,294

' A. C. DAMAN DRIER Fiied June 26. 1922 2 Sheets-Sheet 2 Patented Get.2, 1923.

warren I tieazaa ARTHUR o. DAMAN, on DENVE ,potoneno, .l

Application jfilea nine 26. le aa. Serial No. 570522.

ToaZZ whom/it may Eon-came Be it known that I; Aizrrrna (lfDaQimri,citizen of the United. States of. America,

residing at Denver; in the county oflDenver and State of Colorado, haveinvented certain. new and useful improvements in Briers, of.

which the following is a specification.

This invention relates to 'dr 'ers' I of, the

revolving drum t pe and has for its principal obje ct the prhuision of adevice of this character in which. materials of 'a sticl y, viscousnature will be prevented. from adhere ing to the inside of the drum;

v Another object of theinvention is to pro drier, which result insimplicitypeeonomy and efficiency, and which will become .more apparentfrom the following description;

Inthe following detailedfdescription of the invention reference is hadto the -ac companying drawings which form apart hereof. Likenumeralsrefer to like parts in all views of the drawings and throughoutthe description. 7 4 7 in the drawing;

lig l is a side elevation of the improved drier, partly broken away toshow the interior construction thereof;

Fig. 2 is a vertical section taken on'the line 2-42, Fig. 1.

Fig. 3 is a similar section taken through the furnace on the line 3-3,Fig. 1.

Fig. 4f is a horizontal section through the furnace taken on the linee-fFig. 3.

Fig. 5 isa similar section taken on the line 5-5, Fig. 3. a

Let the numeral designate a cylinder or drum which serves as the drier.proper. Drum 10 is slightly inclined toward its rearward or dischargeend and is of the proper diameter and length to suit the capacityrequired. -Drum is surrounded by wo bearing rings 11 and 12 which rideon supporting rolls 13 and 14L respectively. A

tion to the drum 10... j V

counter shaft 17 which turn is diiiven'by means :Qfga, belt pulley'IS,or i'n -a'ny desired.-

manner-j I M a T, c I 1 The higherextremity of drum- 101s open; to theinterior of a furna ce l9, gthe lower extremity opcningiinto' a housing20. An

exhaust fan 21 is supportedonthe'jh'ousing 20 and discharges intoa stack22. g i

llfounted above the furnace 19 and opening into the drum: 1() is a'feeder23 provided with ,a feed'hopper 24. IA shaft 25 carrying a helicalscraper 26 extends throughout the entire drum 10 intothe feeder 23.Shaft 25 is clriven by ,means of a chainQT from the countershaft 17Lzon'ta-lly adjustable bearings 28. The bear rings 28 are so adj'usted astobring the pea ripheryofthe scraper/26010543 against the inner'wallofithe drum 10, as shown in Fig. 2. Scraper .Zfirotates' intheopposite dire'c-- The furnace l9consists of an outer; surround111gwall'29 supporting an arch 30' "lifhaftfloand feeder 23 v are slid-ablymounted. by means. of hengear also surrounds-the drum lO anfd;mesheswithiafldrrve p1n1on-l6 carried on a which completelycloses thetop of the fur-fi nacec The drum 10 o-pens to the furnace:

1 9. at the high point belo'w arch 30.. Containedwithin the furnace is afire box, '31; consisting iof two side walls 32 and back wall 33.1" Backwall 33 extends entirely across the furnace 19. Walls 32 and 33 arespaced Tawayfrom, the outer walls 29 thereby formingairipassageways 34at each, side of the fire box 31' and ajcombustion and settling chamber35 at the rear thereof. wanes s2 amiss are stopped below thefarch 30.

Fire box 31 is provided with the usual grates36and an ash pan bottom 37.

Openings 41am left in the lo wenportion of the walls 32 and allowcommunication between the space below the ash pan bottom 37 and thepassage-ways 34c.

Suitable doors and dampers are arranged in the outer walls 29communicating with the space below the ash pan bottom, the ash pan andthe fire box respectively numbered 38', 39, and 4:0.

The operation of the furnace is as follows: The fire is carried on thegrates 36, air for the proper .combustionfthereof being admitted throughthe'door'anddamper 39. Additional air is admitted through the door anddamper 38 into the space below the ash pan passing from thence out theopenings 41 and up the passageways 3e over the entirelength of the walls32, into the com bustion space under the arch 3O thence into the drum10, with the combustion-- gases of. the fire, and, through the fan 21,up the stack 22. V s j 1 The advantages of this system of admit-c tingthe air are many and it is one of "the principal features of theinvention. 1 It allows a large volume of heatedair' to be drawn throughthedrum 10 without it being necessary/to pass all o'fthe air through thefire bed and cause too rapid combustion. The

' rising column of air at each sideof t 7 carried into the drum 1O-andno part of they furnace is sub "ected to an accumulation of air ispreheated by its passage aro n the firebox and is admitted'to, andabsorbsheat frointhe combustion proper at thehottest point beforeentering the drum 10. The he fire box absorbs all heat adiated from thewalls thereof which in thequsualconstruction is, wasted. The temperatureof the outer-"walls is kept low by the rapidly moving air be tween them"and the fire box. j The arch, which in the usual type of constructionburnsout rapidly and must befoften replaced, is protected by the movinglayer of heat-absorbing air which travjel's up the inner side of theouter walls and along'under the arch. The heat from the fire is rapidlyexcessive temperature.

V'lhe course of the material being dried through the drier is asfollows: From the.

feed hopper 24, the material is carried into the drum IO'hy means ofthehelical scraper 26', which, in the feeder 23, acts as a spiral conveyer.It is carried through the; re-

volving drum 10 by gravity, each particle as it falls from theascending-side of the drum advancing itself slightlylb eca'use of theslant of the drum. Any particles which ad here to the drum are scrapedloose by the revolvin scra )er 26 the edes of which are.

8 i c i constantly moving along the inner surface of the drum at anangle which tends to work all material toward the discharge end of thedrum 10. The materi'al'falls from the open discharge end of the drumintothe housing ton thereof.

20 and is removed through a clean out door l2.- i

While I have described and illustrated "herein a specific form ofimyinvention I wish it understoodthat the same may be varied, within thescope of the appended claims without de )artin from the s irit 7 D V 7thereof.

while I have described and illustratedmy invention,iwhat claim anddesire to secure by Letters Patentis: 7 I c 1,1ri a! drierthe'combination with a; revolving drum, of a helix mounted in said drumand adapted to scrape material from the wall .thereofandmeans foradjusting said helix in relation to' said wall. 7

2. in a drier the combination with arevolving drum, of a'furna-ceopening"v into one endof said drum and a fire-box contained within saidfurnace, the walls of said firebox being 'sp'a'ced away from thewalls ofsaid furnace and terminating below the In a drierf'the con'ibinati'onwith are, volving drum, of a furnace opening into one end of said drum;a fire-box contained-within said furnace','the walls e f-said fireaboxbeing spaced away from the walls of said furnace and terminating belowthe top theresaid spaced walls; 1

of and means for admitting air between e. Ina drier the combination withafre-i vo-lving drum, of a furnace opening into one end of said drum; afire-box contained with-' insaid furnace, the walls of's'aid fire hoxbemg spaced away from the walls'of said ARTHUR e. Dania.

l3 affixmy signature.

furnace and terminating below the top

